Depends if you have a cheap non skilled loop system installed that Fraud heating companies Or stumble bum plumbers are known to install instead of a professional 2 pipe system.
Also do you have Quality cast Iron baseboard or copper fin tube.
If your installer was kind enough to install a Hoffman #75 Orsmart enough to install a Spirovent for micro bubble removal you shouldnt have to bleed this system at all.
The only time you do bleed a system if one section of the heating element Or (radiator) Or a zone doesnt get hot. Then you bleed the air out.
Send me a private E mail and ILL explain how to properly do it
Or contact Harold as he is one of the best out there.